Cadillac Fleetwood
The 1976-1996 Fleetwood vehicles are the primary targets here, but the series never gained a good footing. It lasted about 20 years, but it stalled, jerked, and made odd noises. Overall, the Cadillac brand only made 15,109 in 1996 and stopped.
Ferrari Mondial 8
Ferrari produced the Mondial 8 in 1980 for two years. Rumors flew that the systems in each model failed. However, it was called impressive and respectable when it first came on the scene. The truth came out after it had been available for a year or so.